Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 411, NWS Norman, OK

May 26, 2016Grady County, McClain County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 26, 2016, 11:02 PM CDT for Grady County, McClain County, Oklahoma. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 26, 2016, 11:02 PM CDT (04:02 UTC)
Expired: May 26, 2016, 11:30 PM CDT
In force: 28 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Grady County, OK, McClain County, OK

The radar

The Norman radar (KTLX), 50 km from the middle of the area, began a volume at 04:05 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 4.0 hours before the alert went out and 33 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 655 J/kg
Mixed-layer CIN: -165 J/kg
Mixed-layer LCL: 1432 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 209 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 8.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 26, 9:47 PM CDT, 1 hour 15 minutes earlier.

Area forecast discussion, May 26, 9:47 PM CDT, 1 hour 15 minutes before

Area Forecast Discussion...UPDATED
National Weather Service Norman OK
947 PM CDT THU MAY 26 2016

.UPDATE...
adjusted rain chances tonight...mainly to increase them in
western oklahoma...and decrease them near and east of i-35.

&&

.DISCUSSION...
severe thunderstorms with heavy rainfall will continue tonight
mainly over western oklahoma and western north texas. severe
threat is much lower near and east of i-35 tonight.

latest radars indicated two main clusters of severe storms...
one near woodward and cheyenne...and another near frederick
and vernon. these storms will continue to push east for
the next several hours...but will move into a more capped
and more stable airmass with lower instability across
the central third of oklahoma. overall...think these storms
will weaken over the next few hours.

still think large hail...damaging winds...and very heavy rainfall
are the main hazards with these storms for the next few hours in
western oklahoma and western north texas. tornado risk appears to
be fairly low and only confined to western oklahoma and western
north texas.

products will be updated shortly.

mbs

&&

.PREV DISCUSSION... /issued 645 PM CDT THU MAY 26 2016/

DISCUSSION...
Aviation discussion for the 00z TAFs is below.

AVIATION...
Have very low confidence in the TAFs. Overall...think VFR
conditions will occur.

Some MVFR conditions are likely to occur across the area...mainly
07-16z...but not sure exactly where and when.

Isolated to numerous TSRA will occur across Oklahoma and north
Texas for the next 24 hours. Determining exactly where and when
this activity occurs remain uncertain. Kept VCTS and TEMPO TSRA
mention at sites in western Oklahoma and western north Texas
through 06z where confidence of storms is higher.

Non-convective low level wind shear may form 01-13z across parts
of the area...but did not mention due to low confidence of
occurrence.

MBS

PREV DISCUSSION... /issued 343 PM CDT THU MAY 26 2016/

DISCUSSION...
With the exception of far northwest Oklahoma, most of the western
third of Oklahoma and adjacent area of northern Texas are clear
to partly cloudy. Weak height falls will overspread the
Panhandles late this afternoon and evening in advance of a trough
over Colorado/New Mexico. At least widely scattered thunderstorms
should develop along and near a dryline in extreme western
Oklahoma/far eastern Texas panhandle. Extreme instability and deep
layer shear will result in supercells capable of producing very
large hail...damaging RFD winds and perhaps tornadoes. With better
forcing compared with the past few days...storms should become
scattered perhaps widespread during the evening and overnight. By
late evening and overnight the main severe weather risk will be
damaging winds and hail.

Most model suggest storms will be ongoing across at least south
central and southeast Oklahoma Friday morning. There should be enough
recovery by Friday afternoon, to see widely scattered severe
storms.

Weak shortwave ridging Friday night through Saturday may provide
a lull in thunderstorm activity as the holiday weekend begins.

Thunderstorm chances will return by Sunday and last through at
least mid week. The overall flow Sunday into Monday will be rather
weak...but moderate to high instability may result in severe
thunderstorms each day.

A weak cold front may move across the Southern Plains Tuesday
into Tuesday night. This may bring some brief relief from rather
high humidity currently in place.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  66  82  63  86 /  50  40  20  10
Hobart OK         64  91  60  88 /  70  10  10  10
Wichita Falls TX  65  90  62  89 /  50  40  10  10
Gage OK           60  86  55  87 /  80  20  10  10
Ponca City OK     67  82  63  84 /  50  40  40  10
Durant OK         68  80  67  86 /  40  70  50  20

&&

.OUN Watches/Warnings/Advisories...
OK...None.
TX...None.
&&

17/17

Hazardous weather outlook, May 26, 9:13 PM CDT, 1 hour 49 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
913 PM CDT THU MAY 26 2016

OKZ004>048-050>052-TXZ083>090-280215-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-
NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-
BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-
CLEVELAND-POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-
TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-
JEFFERSON-CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-
FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
913 PM CDT THU MAY 26 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN...
WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN
NORTH TEXAS.

.DAY ONE...TONIGHT...

.THUNDERSTORMS...
THERE IS A RISK FOR SEVERE STORMS ACROSS OKLAHOMA AND WESTERN
NORTH TEXAS THROUGH EARLY FRIDAY.

LOCATION...
AN ENHANCED RISK AREA IS WEST OF A LINE FROM WAKITA... TO EL
RENO... TO DUNCAN AND WAURIKA... INCLUDING ALL OF WESTERN NORTH
TEXAS. A SLIGHT RISK AREA ENCOMPASSES AREAS WEST OF A CHANDLER TO
MARIETTA LINE.

TIMING...
THE MOST LIKELY TIME FOR SEVERE STORMS WILL BE NOW THROUGH 3 AM.

IMPACTS...
LARGE HAIL UP TO THE SIZE OF BASEBALLS...DAMAGING WIND GUSTS UP
TO 80 MPH...AND HEAVY RAINFALL THAT COULD LEAD TO FLASH FLOODING
WILL BE THE MAIN CONCERNS. THERE IS ALSO A LOW RISK OF
TORNADOES... MAINLY ACROSS WESTERN OKLAHOMA AND WESTERN
NORTH TEXAS.

DISCUSSION...
DISCRETE SUPERCELLS JUST EAST OF A DRYLINE IN FAR WESTERN OKLAHOMA
AND WESTERN NORTH TEXAS WILL PRODUCE MOST SEVERE WEATHER REPORTS
TONIGHT...MAINLY IN THE FORM OF VERY LARGE HAIL AND DAMAGING WIND
GUSTS. THESE STORMS SHOULD WEAKEN AS THEY MOVE EASTWARD LATER
TONIGHT. THERE IS A CHANCE THAT STORMS COULD ORGANIZE INTO ONE
OR MORE CLUSTERS LATER TONIGHT AS THEY APPROACH THE CENTRAL THIRD
OF OKLAHOMA.

THERE IS ALSO A RISK FOR A FEW TORNADOES... MAINLY IN WESTERN
OKLAHOMA AND WESTERN NORTH TEXAS... THIS EVENING.

THE POTENTIAL FOR SEVERE STORMS WILL DECREASE AFTER 3 AM BUT
STORMS WILL LIKELY CONTINUE FRIDAY MORNING WITH SMALL HAIL AND
GUSTY WINDS POSSIBLE WITH THE STRONGEST STORMS.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS
THE RISK AREA SHOULD PREPARE FOR SEVERE WEATHER OPERATIONS
THROUGH TONIGHT.

.HEAVY RAINFALL...
SEVERAL LOCALIZED AREAS HAVE ALREADY RECEIVED AN ABUNDANT AMOUNT
OF RAINFALL OVER THE PAST SEVERAL DAYS. THE THREAT OF LOCALIZED
FLASH FLOODING WILL CONTINUE WHERE THUNDERSTORMS MANAGE
TO DEVELOP.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

.THUNDERSTORMS...
THUNDERSTORMS WILL REMAIN POSSIBLE INTO EARLY NEXT WEEK. STRONG
TO SEVERE STORMS ARE EXPECTED FOR AT LEAST PORTIONS OF THE AREA
EACH DAY. THE MOST LIKELY AREA FOR SEVERE STORMS FRIDAY WILL BE
ALONG AND SOUTH OF I-40 AND ALONG AND EAST OF I-35.

.HEAVY RAIN...
HEAVY RAIN THAT COULD LEAD TO LOCALIZED OR FLASH FLOODING WILL
ALSO REMAIN POSSIBLE THROUGH AT LEAST THIS WEEKEND.

GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW
OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.

MBS

In the hours before

Local storm report, May 26, 10:33 PM CDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1033 PM CDT THU MAY 26 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1033 PM     HAIL             LAWTON                  34.60N 98.42W
05/26/2016  E1.00 INCH       COMANCHE           OK   POST OFFICE

&&

JPIKE

Local storm report, May 26, 10:38 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1038 PM CDT THU MAY 26 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1010 PM     NON-TSTM WND GST FORT COBB               35.10N 98.44W
05/26/2016  M81 MPH          CADDO              OK   MESONET

            POSSIBLE HEAT BURST

&&

JPIKE

Local storm report, May 26, 10:39 PM CDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE NORMAN OK
1039 PM CDT THU MAY 26 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1010 PM     NON-TSTM WND GST 4 NNW FORT COBB         35.15N 98.46W
05/26/2016  M81.00 MPH       CADDO              OK   MESONET

            POSSIBLE HEAT BURST

&&

JPIKE

Local storm report, May 26, 10:45 PM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1045 PM CDT THU MAY 26 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1039 PM     TSTM WND GST     HARROLD                 34.08N 99.03W
05/26/2016  M61 MPH          WILBARGER          TX   FIRE DEPT/RESCUE

            RELAYED BY ELECTRA VFD

&&

JPIKE

Local storm report, May 26, 10:52 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1052 PM CDT THU MAY 26 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1038 PM     HAIL             SEILING                 36.15N 98.92W
05/26/2016  E1.00 INCH       DEWEY              OK   PUBLIC

1038 PM     TSTM WND GST     SEILING                 36.15N 98.92W
05/26/2016  E60 MPH          DEWEY              OK   PUBLIC

            ESTIMATED

&&

JPIKE

Special weather statement, May 26, 10:57 PM CDT, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1057 PM CDT THU MAY 26 2016

OKZ027-028-270430-
GRADY OK-MCCLAIN OK-
1057 PM CDT THU MAY 26 2016

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL GRADY AND WEST CENTRAL
MCCLAIN COUNTIES UNTIL 1130 PM CDT...

AT 1056 PM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING FROM
5 MILES SOUTHEAST OF CEMENT TO NEAR CHICKASHA TO 4 MILES SOUTHWEST OF
DIBBLE...MOVING NORTHEAST AT 25 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...

LAT...LON 3473 9807 3501 9809 3522 9781 3523 9763
      3508 9739
TIME...MOT...LOC 0356Z 226DEG 21KT 3487 9807 3502 9791 3501 9769

..SPEG.

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 26, 7:04 PM CDT	Special Weather Statement	OUN	Beckham	26 min
May 26, 7:22 PM CDT	Special Weather Statement	OUN	Kiowa	23 min
May 26, 7:32 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Dewey, Ellis, Roger Mills	43 min
May 26, 7:33 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper	42 min
May 26, 7:58 PM CDT	Areal Flood Advisory	OUN	Ellis, Harper	3 hr
May 26, 8:10 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woods	50 min
May 26, 8:13 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woodward	47 min
May 26, 8:15 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Ellis, Roger Mills, Woodward	45 min
May 26, 8:23 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson	52 min
May 26, 8:24 PM CDT	Tornado Warning	OUN	Ellis	36 min
May 26, 8:53 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	52 min
May 26, 8:53 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	40 min
May 26, 8:57 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Major, Woods, Woodward	37 min
May 26, 8:58 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Major, Roger Mills, Woodward	47 min
May 26, 8:59 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Kiowa	31 min
May 26, 9:01 PM CDT	Tornado Warning	OUN	Ellis, Woodward	33 min
May 26, 9:08 PM CDT	Areal Flood Advisory	OUN	Ellis, Roger Mills, Woodward	3 hr
May 26, 9:30 PM CDT	Tornado Warning	OUN	Roger Mills	30 min
May 26, 9:45 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	45 min
May 26, 9:45 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Major, Roger Mills, Woodward	45 min
May 26, 9:57 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	48 min
May 26, 9:59 PM CDT	Tornado Warning	OUN	Ellis, Roger Mills	35 min
May 26, 10:14 PM CDT	Flash Flood Warning	OUN	Dewey, Ellis, Roger Mills, Woodward	4 hr
May 26, 10:29 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Dewey, Ellis, Major, Roger Mills and 2 more	46 min
May 26, 10:33 PM CDT	Areal Flood Advisory	OUN	Comanche, Kiowa, Tillman	3 hr
May 26, 10:34 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	26 min
May 26, 10:41 PM CDT	Flash Flood Warning	OUN	Comanche	2 hr
May 26, 10:42 PM CDT	High Wind Warning	OUN	Caddo, Canadian, Grady	78 min
May 26, 10:44 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	27 min
May 26, 10:57 PM CDT	Special Weather Statement	OUN	Grady	33 min
May 26, 11:16 PM CDT	Special Weather Statement	OUN	Major	29 min
May 26, 11:19 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland	41 min
May 27, 12:10 AM CDT	Special Weather Statement	OUN	Lincoln, Oklahoma	35 min
May 27, 12:16 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Oklahoma, Pottawatomie	44 min
May 27, 4:23 AM CDT	Special Weather Statement	OUN	Carter, Love	67 min
May 27, 4:53 AM CDT	Areal Flood Advisory	OUN	Carter, Love	37 min
May 27, 5:02 AM CDT	Special Weather Statement	OUN	Carter	28 min
May 27, 7:32 AM CDT	Special Weather Statement	OUN	Carter, Garvin, Jefferson, Love, Murray	58 min
May 27, 2:02 PM CDT	Special Weather Statement	OUN	Grant	28 min
May 27, 2:25 PM CDT	Special Weather Statement	OUN	Grant	35 min
May 27, 2:56 PM CDT	Special Weather Statement	OUN	Grant	34 min
May 27, 3:09 PM CDT	Severe Thunderstorm Warning	OUN	Grant	51 min
May 27, 3:48 PM CDT	Areal Flood Advisory	OUN	Grant	117 min
May 27, 3:54 PM CDT	Special Weather Statement	OUN	Alfalfa	36 min
May 27, 3:57 PM CDT	Severe Thunderstorm Warning	OUN	Grant	38 min
May 27, 4:26 PM CDT	Special Weather Statement	OUN	Comanche	34 min
May 27, 4:42 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady	35 min
May 27, 4:45 PM CDT	Special Weather Statement	OUN	Grant	30 min
May 27, 4:48 PM CDT	Severe Thunderstorm Warning	OUN	Grant	42 min
May 27, 4:51 PM CDT	Special Weather Statement	OUN	Stephens	24 min
May 27, 5:15 PM CDT	Special Weather Statement	OUN	Stephens	45 min
May 27, 5:28 PM CDT	Special Weather Statement	OUN	Grant	32 min
May 27, 5:30 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain, Stephens	45 min
May 27, 5:36 PM CDT	Special Weather Statement	OUN	Stephens	24 min
May 27, 5:40 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Stephens	50 min
May 27, 5:45 PM CDT	Special Weather Statement	OUN	Grady	30 min
May 27, 5:46 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain	44 min
May 27, 5:49 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay	41 min
May 27, 6:11 PM CDT	Special Weather Statement	OUN	Cleveland, Garvin, McClain	49 min
May 27, 6:19 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	41 min
May 27, 6:22 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	38 min
May 27, 6:27 PM CDT	Special Weather Statement	OUN	Garvin, Murray	33 min
May 27, 6:35 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Oklahoma	40 min
May 27, 6:43 PM CDT	Special Weather Statement	OUN	Garfield	32 min
May 27, 6:45 PM CDT	Areal Flood Advisory	OUN	Grant, Kay	3 hr
May 27, 6:46 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan, Noble	44 min
May 27, 6:53 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	52 min
May 27, 6:57 PM CDT	Special Weather Statement	OUN	Garvin	48 min
May 27, 6:57 PM CDT	Severe Thunderstorm Warning	OUN	Kay	48 min
May 26, 7:02 PM CDT	Severe Thunderstorm Warning	OUN	Wilbarger	28 min
May 26, 7:34 PM CDT	Special Weather Statement	OUN	Foard	26 min
May 26, 7:45 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Knox	45 min
May 26, 8:04 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor	41 min
May 26, 8:25 PM CDT	Severe Thunderstorm Warning	OUN	Foard	50 min
May 26, 8:48 PM CDT	Tornado Warning	OUN	Foard	27 min
May 26, 9:15 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Wilbarger	45 min
May 27, 3:25 AM CDT	Special Weather Statement	OUN	Clay	50 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2016 Every severe thunderstorm warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.